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How long does it take light to travel through a 6.73 mm thick piece of window glass? Through what thickness of water could light travel in the same amount of time.
A kid balances on a pogo stick. His mass combined with the mass of the pogo stick is 22kg. How much pressure does the pogo stick put on the ground
Estimate the power radiated by a basketball at 20 deg C and a human body at 37 deg C. Use Stefan-Boltzmann Law
a cylindrical tube oriented vertically on earths surface closed at the bottom and open at the top height 100 m cross
A person is standing at the edge of the water and looking out at the ocean (see figure). The height of the person's eyes above the water is h = 1.8 m, and the radius of the Earth is R = 6.38 x 106 m. (a) How far is it to the horizon? In other word..
A block that was initially at rest is sliding on a steel surface at 0.8 m/s for .2 m. Calculate the temperature rise from friction
White light is incident normally on a thin soap film ( = 1.33) suspended in air. What are the two minimum thicknesses that will constructively reflect yellow ( = 577 ) light? Enter your answers in ascending order separated by a comma
A ramp is a simple machine which can be used to load heavy items onto a truck. What is the mechanical advantage of a ramp that makes the angle of 26o regarding the horizontal.
In a typical Hollywood movie stunt, a person jumps off a building and lands on a cushion to safely stop. How much voltage should the battery have to stop the object as it reaches the ground
A hot air balloon is descending vertically with a speed of 4.0 m/s when a passenger drops a 0.5 Kg camera. If the camera is 45 m above the ground when it is dropped:
A loudspeaker of mass 15.0 is suspended a distance of h = 2.30 below the ceiling by two cables that make equal angles with the ceiling. Each cable has a length of l = 3.30. What is tension in each cable.
Three identical point charges each of charge q are located at the vertices of an equilateral triangle, Find a symbolic expression for the electric potential at the center of the triangle
Red light of wavelength 670.0 nm produces photoelectrons from a certain photoemissive material. What is the material's work function
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